package com.alex.test;

import java.util.HashMap;
import java.util.Map;

/**
 * @Author: 葛成瑞
 * @Date: 2025/1/25 11:30
 */
public class HS {
    public static void main(String[] args) {
        Map<Long, String> res = new HashMap<Long, String>();
        res.put(1L, "1");
        res.put(2L, "1");
        res.put(3L, "1");
        res.put(4L, "1");
        res.put(5L, "1");
        res.put(6L, "1");
        res.put(7L, "1");
        res.put(8L, "1");
        res.put(9L, "1");
        boolean b = res.containsKey(2);
        System.out.println(b);


    }
}
